Seal for a joint or juncture – Seal between relatively movable parts – Relatively rotatable radially extending sealing face member
Patent
1983-07-06
1984-05-22
Ward, Robert S.
Seal for a joint or juncture
Seal between relatively movable parts
Relatively rotatable radially extending sealing face member
277142, 277165, 277152, F16J 1532
Patent
active
044497180
ABSTRACT:
In packings for hydraulic pistons or piston rods with a packing ring comprised of a tough elastic synthetic material as the contact packing between a stationary machine part comprising an annular groove and a moving machine part comprising an initial slope and of a rubber clamping ring clamping the packing ring radially and providing a sealing action with respect to the annular groove in the stationary machine part, an annular surface is located between the end face of a step at the high pressure side and a conical surface adjoining the latter on the low pressure side, which annular surface forms an obtuse angle with the conical surface of such a value that when the packing travels in over the initial slope the resultant F.sub.res of the normal force F.sub.N and of the frictional force F.sub.R halves the sealing edge angle. When using conventional materials and conventional angles for the conical surface and the inlet slope, a value of 45.degree. is provided for the angle between the annular surface and the packing axis. The axial length of the annular surface preferably amounts to 5% of the axial length of the packing ring.
REFERENCES:
patent: 2868574 (1959-01-01), Rich
patent: 3011803 (1961-12-01), Buckner et al.
patent: 3315972 (1967-04-01), Ahbeck
patent: 3942806 (1976-03-01), Edlund
patent: 4198063 (1980-04-01), Shimizu et al.
patent: 4230324 (1980-10-01), Derman
patent: 4234196 (1980-11-01), Sida
Busak & Luyken
Ward Robert S.
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